I have underdrives in stock for 1.0, and 1.3 SOHC motors with the 3 groove belt. Made from 6061 aluminum, and red anodized, they are available in either 4 bolt, or 5 bolt, and feature a 25% underdrive. Included with the pulley are new high quality, rolled thread socket cap screws.Special price for this batch.$50us to teamswift members, plus shipping.

Crappy Tire very rarely carries that size, simply because its used on incredibly few applications. I would highly suggest just going to NAPA. A 300K3 will indeed fit, and once it wears in (stretches), you will even have to tighten it a bit. But it is SNUG when you first put it on.

OK I have the underdrive on... I've been waiting to post this b/c my lense on my digicam is acting up and I wanted to include pics, but that wont happen in the next few days or so.

I've had the underdrive on all week, and its made a noticable difference. It idles so much nicer now, and I was even able to advance the ignition a bit more (wierd eh?). I first had a 31" belt on it, but found it too long, so I went with the 30 and am glad I did. I've not noticed any mpg gains yet, because I've yet to fill up with gas, although it gets through the powerband quicker and has made a noticable difference on accel. Just to give an example of how small it is, it fits inside the old pully and has about 7-8mm to spare in space when its in it. It is TINY and light. When I get my lense clean I'll post some pics and update my gallery.

I just asked the guy for a metro pully, but in 30". he had a 30" and a 28"?!?. What would a 28" fit, our belt is as small as I could imagine.

The 30" was a little snug, but I got the belt around the crank, alternator and three quarters the waterpump then turned the engine with a wrench and the belt snapped into place. It needed to be snugged just a little.

1. It reduces rotating mass from the crankshaft, allowing it to make RPM changes more quickly (quicker acceleration).

2. It is 25% smaller in diameter than the stock pulley. This means that for every turn of the crank, your accessories are not turning as much as they used to. This takes a bit of a load off of the engine, further freeing up horsepower that was previously wasted (ok maybe not wasted since you *do* need the accessories ) turning the accessories at a higher ratio.

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